JP2003221914A - Metal floor post - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal floor post which is highly safe and whose strength can be maintained for a long time by virtue of extremely excellent corrosion resistance. <P>SOLUTION: In this metal floor post, a base material is composed of an iron-based material; a galvanized layer is formed on a surface; a chromate film layer is formed on the galvanized layer; and on the chromate film layer, there is formed a baking coated film layer which comprises paint predominantly composed of resins such as a silicon resin and an alkyd resin, and in which carbon powder equivalent in weight ratio to 5-70% and aluminum powder are contained in the paint. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention is under a floor of a building such as a detached house, and is fixed on a slab, a solid foundation, or the like, and receives a heavy duty. The present invention relates to a metal floor bundle. 2. Description of the Related Art Conventionally, wooden bundles have been used as bundles for supporting a large house under the floor of a building such as a detached house. Such a wooden bundle measures the height from the foundation to the skid, transports the wood to the cutting place, cuts it according to the above measurement dimensions, installs the wood of this predetermined size on the foundation, and pulls the skid. The receiving is done. In many cases, the above-mentioned series of operations are performed by a plurality of workers, and height measurement and cutting and mounting of wood are performed by different workers, and the mounting place is often mistaken. In such a case, in order to adjust the height of the bundle to a large height, wood cut into a wedge shape is driven into the gap. [0003] In the above-mentioned wooden bundle, the work of cutting wood to a predetermined size and the work of adjusting the height with a wedge are extremely complicated. In addition, the wood is likely to warp due to water absorption or drying, and is likely to be deformed by a load. Further, since the scrap material is mainly used for the bundle material, the material is also different, and there is a difference in the deformation and the deviation depending on the material. In addition, termite control agents, soil treatment agents, xylem treatment agents, etc. are used because they are easily attacked by termites and decay fungi. In recent years, however, due to increasing international environmental awareness, the living environment has an effect on the human body. In view of this, the use of drugs has been reduced or drugs have been changed to relatively soft drugs. Therefore, the effective period of the drug is shortened, and the durability is not sufficient. In addition, housing has entered the era of price competition these days, and shortening the construction period and eliminating claims are the biggest issues for housing manufacturers. [0004] Therefore, recently, steel floor bundles have been used instead of wooden bundles. As shown in FIG. 8, the steel bundle includes a support plate 11 for supporting the pulling pulley 10 and a base plate 13 fixed to the slab stone 12. A screw rod 14 is vertically provided on the lower surface of the support plate 11, and a screw rod 15 is provided on an upper surface of the base plate 13.
Are connected by a turnbuckle portion 16. The height of the steel bundle is adjusted by rotating the turnbuckle 16 to raise and lower the support plate 11. According to such a steel bundle, the work period can be shortened by shortening the working time, the "post-adjustment" for adjusting to a large dimensional change is easy, and the problem of accuracy is solved. There is also a great merit that there are no problems such as problems and the number of claims is reduced. For this reason, each house maker is using a steel bundle instead of a wooden bundle. [0005] The steel bundles described above have been used for many years under humid floors. Moreover, the moisture that penetrates under the floor is not just moisture,
It often contains corrosive environmental substances such as salt wind containing sea salt particles, exhaust gas containing SOX / NOX, acid rain, etc., which come from the use environment and air pollution. In particular, acid in acid rain tends to condense in snowy areas, and corrosion progresses rapidly in heavy industrial areas and coastal industrial areas due to air pollution. Therefore, rust measures are an important issue in the above-mentioned steel bundle. [0006] However, at present, zinc plating is only used as a rust preventive treatment for steel bundles. In the metal single-layer film formed by zinc plating, corrosion resistance to moisture containing corrosive substances such as sulfurous acid gas and nitrogen oxide is not sufficient, and zinc is easily formed in a place having a bad corrosive environment (for example, an environment having a pH of 4 or less). There is a problem that it melts out and corrodes rapidly (for example, zinc corrosion in a coastal industrial zone reaches as much as 5 μm per year). Moreover, in recent years, the life required for houses has also been prolonged, and 50-year houses and 100-year houses have been put on the market, and there is a demand for steel bundles corresponding to longer life of houses. [0007] When fixing the base plate 13 to the slab stone 12, the steel bundle is hit with a nail 17 (see FIG. 8), and the support plate 11 is fixed to the large pulley 10. As shown in FIG. 9, a nail 17 is used. For this reason, there is a problem that the plating is peeled off from the inner peripheral surface of the nail hole where the nail 17 is rubbed, and rust is easily generated from that portion.
In addition, the different nails come into contact with the parts hit by the nail 17, and so-called foreign metal contact corrosion is likely to occur due to the local battery action. [0008] To improve the corrosion resistance of the steel bundle, a surface treatment such as a so-called dacroidized treatment has been studied. However, such surface treatments have performed better than galvanized in a corrosive environment such as salt water spray, but they are susceptible to acids and the like because the gas and moisture easily penetrate through the treated layer. However, it is not enough in a severe corrosive environment such as the above. In addition, the surface treatment includes a highly toxic hexavalent chromium in the treatment solution,
With the recent rise in environmental awareness, it has become inappropriate to apply a surface treatment using toxic substances that may adversely affect the human body to home appliances. Further, recently, due to the Great Hanshin-Awaji Earthquake, demands for strength and durability of housing equipment have become more and more severe. From these circumstances,
There has been a strong demand for the development of a metal floor bundle which has good corrosion resistance, maintains strength for a long time, and is highly safe. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a metal floor bundle which is extremely excellent in corrosion resistance, maintains strength for a long period of time, and is highly safe. [0011] In order to achieve the above object, a metal floor bundle of the present invention is a metal floor bundle whose base material is made of an iron-based material, and a zinc-plated layer is formed on the surface. Is formed, a chromate film layer is formed on the galvanized layer, and a paint containing a resin such as a silicone resin or an alkyd resin as a main component is formed on the chromate film layer. The gist of the present invention is that a baking coating layer containing aluminum powder in the paint is formed while containing about 70% of carbon powder. That is, in the metal floor bundle of the present invention, a zinc plating layer is formed on the surface, and a chromate film layer is formed on the zinc plating layer. The plating layer is protected, and corrosion of the zinc plating layer is suppressed. Then, a baking coating layer made of a paint containing a silicone resin is formed on the chromate coating layer. As described above, since the paint contains the silicone resin and the chromate film layer is formed as a base, the adhesion of the baked film layer is improved, and the weather resistance is also significantly improved. In addition, since the surface of the chromate film layer is porous, the baked film layer adheres more firmly by the so-called anchor effect, and even if the baked film layer is scratched, rust does not easily progress in the lateral direction, Sufficient corrosion resistance is maintained. Therefore, in the metal floor bundle of the present invention, due to the protective effect of the chromate film layer and the strong adhesion of the baked film layer, the corrosion resistance is dramatically improved as compared with the conventional steel bundle simply coated with zinc plating. And the strength is maintained for a long time even under severe corrosive environment such as a seaside industrial zone. Moreover, since no toxic substances are used, there is no adverse effect on the human body, and the safety is extremely high. In addition, since the carbon powder is contained in the paint containing the silicone resin, the adhesion between the baked coating film and the chromate film layer is further enhanced, and the corrosion resistance is further improved. In addition, the sacrificial anticorrosive action of the aluminum powder having a higher ionization tendency than zinc suppresses the corrosion of the galvanized layer and further improves the corrosion resistance. Further, there is an effect that the coating film strength of the baked coating film layer is improved, and the film is more resistant to scratches and the like. Next, an embodiment of the present invention will be described in detail. FIG. 1 shows an embodiment of a metal floor bundle according to the present invention. This is basically the same as that shown in FIG. 8, and the same parts are denoted by the same reference numerals. In the figure, reference numeral 20 denotes a resin sheet attached to the upper surface of the support plate 11. Reference numerals 30 and 31 denote a through hole and an anchor hole formed in the base plate 13, respectively, and 32 denotes a nail hole. Reference numeral 18 denotes a nut, and 19 denotes a washer. In this metal floor bundle, as shown in FIG. 2, a base material 1 is made of steel, and a zinc plating layer 2 is formed on the surface of the base material 1.
Is formed, and a chromate film layer 3 is formed on the zinc plating layer 2. Then, a baking coating layer 5 is formed on the chromate coating layer 3. The baking coating layer 5 is formed by baking a heat-resistant paint composed of a carbon powder 7 and a resin 6 containing a silicon resin. The thickness of the galvanized layer 2 is 1 to 25 μm.
About m is preferable, and about 2 to 15 μm is still more preferable. If the thickness is less than 1 μm, the corrosion resistance of the galvanized layer 2 is insufficient. If the thickness exceeds 25 μm, the cost of plating increases, and the plating layer 2 itself is easily chipped. Further, the thickness of the chromate film layer 3 is 0.1 mm.
About 01 to 2 μm is preferable, about 0.1 to 1 μm is more preferable, and about 0.1 to 0.5 μm is more preferable. If the thickness is less than 0.01 μm, the protective effect of the galvanized layer 2 and the anchoring effect of the porous layer cannot be sufficiently obtained. If the thickness exceeds 2 μm, the chromate coating layer 3 itself becomes brittle, and the adhesion to the baked coating layer 5. Is worse. The chromate film layer 3 has a thickness of 0.01 to
It is formed by immersing the object on which the zinc plating layer 2 is formed in chromic acid to which a phosphoric acid solution of about 0.5% is added. The chromate film layer 3 thus formed has a strong adhesion to the baked film layer 5. The thickness of the baked coating layer 5 is 3 to 50 μm.
About m is preferable, and about 5 to 30 μm is still more preferable. If it is less than 3 μm, sufficient corrosion resistance cannot be obtained,
If the thickness exceeds 50 μm, the cost increases. The above-mentioned heat-resistant paint mainly comprises a resin 6, such as a silicone resin or an alkyd resin, an aromatic or ester-based solvent, to which a carbon powder 7 is added. About 10 to 15% of an additive such as aluminum powder is added. By adding additives such as the above-mentioned silicon oxide powder, titanium oxide powder, and aluminum oxide powder, there is an effect that the coating strength of the baked coating layer 5 is improved, and the coating layer 5 is more resistant to scratches and the like. The content of the carbon powder 7 in the heat-resistant paint is preferably about 5 to 70% by weight.
It is still more suitable if it is ６０60%. If it is less than 5%, the effect of adding the carbon powder 7 is not sufficient, and if it exceeds 70%, the cost increases and the baking coating layer 5 becomes brittle. The galvanized layer 2, the chromate film layer 3, and the baked film layer 5 include the support plate 11, the base plate 13, the turnbuckle portion 16, and the screw rods 14, 1.
No. 5, nuts, washers, etc. are all formed on the surface of the metal part. The resin sheet 20 attached to the support plate 11 is, as shown in FIG.
Are formed in an L-shape along the upper surface. At the portions corresponding to the nail holes 32 of the support plate 11 on the lower surface and side surfaces of the resin sheet 20, there are formed mounting projections 21 which are detachably fitted to the nail holes 32. A nail insertion hole 22 through which a nail is inserted is formed in the mounting projection 21. The metal floor bundle is used, for example, as follows. First, as shown in FIG. 4, the metal floor bundle is turned upside down, the support plate 11 is applied to the upper surface and the side surface of the large pulley 10, the nail 17 is driven into the nail hole 32, and the metal floor is Secure the bundle. At this time, the nail 17 is driven along the nail insertion hole 22 of the resin plate 20 to prevent direct contact between the support plate 11 and the nail 17 so that a contact portion of a different kind of metal cannot be formed. Next, as shown in FIG. 5, after the dirt and dirt on the upper surface of the skewer 12 are sufficiently removed, an adhesive 23 is applied. Then, as shown in FIG. 6, the metal floor bundle fixed to the pulling pulley 10 is returned to its original position, and the base plate 13 is positioned and adhered to the upper surface of the bracelet 12. At this time, the base plate 1 is removed from the through hole 30, the anchor hole 31, and the nail hole 32.
The adhesive overflows to the upper surface side of 3 and is hardened as it is, so as to prevent the base plate 13 from coming off. Then, if necessary, further insert the nail 1 into the nail hole 32.
7 may be applied. In this case, direct contact between the nail 17 and the base plate 13 is prevented to some extent by the adhesive clogged in the nail hole 32, so that a contact portion of a dissimilar metal is hardly formed. And turnbuckle part 16
Is rotated, the support plate 11 is raised and lowered, and the height of the large pulley 10 is adjusted. According to the metal floor bundle, the zinc plating layer 2 as a base is protected by the chromate coating layer 3 and the corrosion of the zinc plating layer 2 is suppressed. The heat-resistant paint contains a silicone resin and has a chromate film layer 3 as a base.
Is formed, the adhesion of the baked coating film layer 5 is improved, and the weather resistance is also significantly improved. In addition, since the surface of the chromate coating layer 3 is porous, the baked coating layer 5 is more firmly adhered by a so-called anchor effect. Moreover, since no toxic substances are used, there is no adverse effect on the human body. Further, the support plate 11 and the nail 1 are formed by a nail insertion hole 22 formed in the mounting projection 21 of the resin plate 20.
7 is prevented, and so-called foreign metal contact corrosion is prevented. In addition, even when the base plate 13 is bonded with an adhesive, the direct contact between the base plate 13 and the nail 17 is prevented, thereby preventing corrosion of different kinds of metals. FIG. 7 shows a metal floor bundle according to a second embodiment of the present invention. In this case, the heat-resistant paint contains not the carbon powder 7 but the aluminum powder 4. Otherwise, it is the same as that shown in FIGS. 1 and 2, and the same parts are denoted by the same reference numerals. According to the metal floor bundle, the sacrificial anticorrosive action of the aluminum powder 4 having a higher ionization tendency than zinc suppresses the corrosion of the galvanized layer 2 and further improves the corrosion resistance. The content of the aluminum powder 4 in the heat-resistant paint is preferably about 5 to 70% by weight.
It is still more preferable if it is 30 to 60%. If less than 5%
This is because the effect of adding the aluminum powder is not sufficient, and if it exceeds 70%, the cost increases and the baking coating layer 5 becomes brittle. In each of the above embodiments, the base material is made of steel. However, the present invention is not limited thereto, and various types of carbon-based steel, alloy steel, special steel, iron, and other iron-based materials may be used. Can be used. In addition, the zinc plating layer 2
It may be formed by electroplating, or may be formed by hot-dip plating. The method of applying the heat-resistant paint includes, for example, spray application and dipping, but is not limited thereto, and various methods are used. Next, examples will be described together with comparative examples. EXAMPLE 1 A metal floor bundle of a steel base material was formed to a thickness of about 5 μm.
Of a zinc plating layer 2 having a thickness of about 0.2
After forming a chromate film layer 3 having a thickness of μm and applying a heat-resistant paint containing about 3.5% of silicon resin and about 50% of carbon powder, a baking treatment (at a temperature of about 170 to
180 ° C. for about 20 minutes) to form a baked coating layer 5 having a thickness of about 15 μm, thereby obtaining a metal floor bundle of the present invention. Example 2 A metal floor bundle of the present invention was obtained in the same manner as in Example 1, except that a heat-resistant paint containing about 50% of aluminum powder 4 and an additive was used. Comparative Example 1 A metal base bundle of a steel base material was
m of the hot-dip galvanized layer 2 was formed. COMPARATIVE EXAMPLE 2 A metal base bundle made of a steel base material was treated with a dacroidized treatment layer (a treatment liquid such as zinc metal, chromic anhydride, and glycol), and hexavalent chromium was converted into trivalent chromium in a baking furnace. To form a surface-treated layer having zinc particles laminated thereon. Each of the above examples and Comparative Example 1 were compared with JIS Z
Based on 2371, 5% saline was subjected to a salt spray test lasting 1000 hours. As a result, red rust occurred in Comparative Example 1, but there was no abnormality in both Examples. Each of the above examples and Comparative Example 1 were compared with DIN 50
018, sulfur dioxide gas concentration 0.2 liter / 30
The vessel was sealed in a 0 liter tank, kept at 40 ° C./98% RH for 8 hours, then left at 18-28 ° C./75% RH for 16 hours, and subjected to a sulfur dioxide gas corrosion test in which dew formation and drying were repeated. As a result of performing the above test for 26 cycles, in Comparative Example 1, the zinc plating layer was melted out, the base material was discolored to black, and red rust was generated in the screw portion. Each of the above Examples and Comparative Example 2 was sprayed with 5% salt water adjusted to pH 3.0 to 3.1 with salt water and acetic acid.
6H, rest 8H as one cycle, predetermined cycle is 10
It was subjected to a cycle-repeated casting test. As a result, in Comparative Example 2, while red rust was generated for 24 hours in a row,
In each of the examples, no abnormality was observed even after continuous 80 hours. As described above, it can be seen that the metal floor bundles of each of the above examples exhibit extremely superior corrosion resistance as compared with the comparative examples. As described above, in the metal floor bundle of the present invention, the zinc plating layer is formed on the surface, and the chromate film layer is formed on the zinc plating layer. The presence of the coating layer protects the underlying zinc plating layer and suppresses corrosion of the zinc plating layer. Then, a baking coating layer made of a paint containing a silicone resin is formed on the chromate coating layer. As described above, since the paint contains the silicone resin and the chromate film layer is formed as a base, the adhesion of the baked film layer is improved, and the weather resistance is also significantly improved. Also, since the surface of the chromate coating layer is porous, the baked coating layer adheres more firmly by the so-called anchor effect, and even if the baked coating layer is scratched, rust does not easily progress in the lateral direction, Sufficient corrosion resistance is maintained. Therefore, in the metal floor bundle of the present invention,
Due to the protective effect of the chromate coating layer and the strong adhesion of the baked coating layer, the corrosion resistance is dramatically improved as compared with the conventional zinc-coated steel bundle, and severe corrosion in coastal industrial areas etc. The strength is maintained for a long time even in the environment. And because we don't use any toxic substances,
It is extremely safe with no adverse effects on the human body. Further, the adhesion between the baked coating film and the chromate film layer is further strengthened, and the corrosion resistance is further improved. In addition, the sacrificial anticorrosive action of aluminum powder having a higher ionization tendency than zinc suppresses corrosion of the galvanized layer and further improves corrosion resistance. Further, there is an effect that the coating film strength of the baked coating film layer is improved, and the film is more resistant to scratches and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a metal floor bundle according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a surface layer portion of the metal floor bundle. FIG. 3 is a sectional view showing a support plate of the metal floor bundle. FIG. 4 is a perspective view showing a step of attaching the metal floor bundle. FIG. 5 is a perspective view showing a step of attaching the metal floor bundle. FIG. 6 is a perspective view showing a use state of the metal floor bundle. FIG. 7 is an enlarged sectional view of a surface portion of a metal floor bundle according to a second embodiment of the present invention. FIG. 8 is a perspective view showing a conventional steel bundle. FIG. 9 is a perspective view showing a mounting process of the conventional steel bundle. [Description of Signs] 1 Base material 2 Zinc plating layer 3 Chromate coating layer 5 Baking coating layer

   ────────────────────────────────────────────────── ─── Continuation of front page    F term (reference) 2E220 AA11 AA13 AA16 AA60 AC03                       CA04 CA15 CA16 CA20 CA22                       CA63 DA02 DA19 DB12 EA11                       FA11 GA26Y GA30Y GA32Y                       GB02Y GB05Y GB32Y GB36Y

Claims (1)

Claims: 1. A base material is a metal floor bundle made of an iron-based material, a zinc plating layer is formed on a surface thereof, and a chromate film layer is formed on the zinc plating layer. On the chromate film layer, a paint containing a resin such as a silicone resin or an alkyd resin as a main component is used.
A metal floor bundle comprising 70% carbon powder and a baking coating layer containing aluminum powder in the paint.